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A slit of size 0.15m is placed at 2.1m f...

A slit of size `0.15m` is placed at `2.1m` from a screen. On illuminated it by a light of wavelength `5xx10^-5cm`. The width of central maxima will be

A

(a) `70mm`

B

(b) `0.14mm`

C

(c) `1.4mm`

D

(d) `0.14cm`

Text Solution

Verified by Experts

The correct Answer is:
C
Width of central maxima `=(2lambdaD)/(d)`
`=(2xx2.1xx5xx10^-7)/(0.15xx10^-2)=1.4xx10^-3m=1.4mm`
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